Current pulse based ion-selective electrodes for chronopotentiometric determination of calcium in seawater
Liu, Shuwen; Ding, Jiawang; Qin, Wei
发表期刊ANALYTICA CHIMICA ACTA
ISSN0003-2670
2018-11-15
卷号1031页码:67-74
关键词Chronopotentiometry Ion-selective electrode Calcium Seawater Current pulse
研究领域Chemistry
DOI10.1016/j.aca.2018.06.018
产权排序[Liu, Shuwen; Ding, Jiawang; Qin, Wei] Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Shandong Prov Key Lab Coastal Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Yantai 264003, Shandong, Peoples R China; [Ding, Jiawang; Qin, Wei] Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266237, Peoples R China; [Liu, Shuwen] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
作者部门海岸带环境过程实验室
英文摘要Calcium is closely related to the oceanic biosphere and carbonate system. Potentiometry based on a calcium-selective electrode (Ca-ISE) represents a promising tool for detection of calcium ion activities in seawater. This technique, however, generally is limited by the low sensitivity for the inherent Nernstian response (i.e. ca 30 mV/dec). A current pulse based ion-selective electrode with enhanced sensitivity for chronopotentiometric measurements of calcium in seawater is proposed. The Ca2+-selective membrane containing lipophilic salt ETH 500 instead of traditional ion-exchanger is galvanostatically controlled. An applied constant cathodic current pulse can leads to the extraction of the calcium ions into the membrane to produce a chronopotential response, which shows a stable and reproducible super-Nernstian response in a narrow calcium activity range. The super-Nernstian region of the electrode depends on not only the the magnitude and duration of the applied current pulse but also the interfering ions. Under optimal conditions, the proposed Ca-ISE exhibits a super-Nernstian response between the calcium concentrations of 10(-)(2.5)-10(-)(1.5)M with a slope of ca 80 mV/dec. The current pulse based Ca-ISE has been applied to determination of calcium in seawater with satisfactory results. (C) 2018 Published by Elsevier B.V.
文章类型Article
资助机构National Natural Science Foundation of China [21575158, 21677172] ; Chinese Academy of Sciences [Y728021021] ; National Key Research and Development Program of China [2016YFC1400700] ; CAS Youth Innovation Promotion Association [2014190] ; Taishan Scholar Program of Shandong Province [TS20081159]
收录类别SCI
语种英语
关键词[WOS]GALVANOSTATIC CONTROL ; MASS-SPECTROMETRY ; ALKALINITY ; MAGNESIUM ; HEPARIN ; RATIOS ; CARBON ; WATER ; SEA ; SPECIATION
研究领域[WOS]Chemistry, Analytical
WOS记录号WOS:000441511600007
引用统计
被引频次:12[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/24576
专题中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
中国科学院海岸带环境过程与生态修复重点实验室
作者单位1.Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Shandong Prov Key Lab Coastal Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Yantai 264003, Shandong, Peoples R China;
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266237, Peoples R China;
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Liu, Shuwen,Ding, Jiawang,Qin, Wei. Current pulse based ion-selective electrodes for chronopotentiometric determination of calcium in seawater[J]. ANALYTICA CHIMICA ACTA,2018,1031:67-74.
APA Liu, Shuwen,Ding, Jiawang,&Qin, Wei.(2018).Current pulse based ion-selective electrodes for chronopotentiometric determination of calcium in seawater.ANALYTICA CHIMICA ACTA,1031,67-74.
MLA Liu, Shuwen,et al."Current pulse based ion-selective electrodes for chronopotentiometric determination of calcium in seawater".ANALYTICA CHIMICA ACTA 1031(2018):67-74.
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